python - 迭代切片数组的计算效果

Question

如果我取一个切片的切片......一个numpy数组，我是在创建一个深度嵌套的数据结构吗？

我要问的概述：

data = np.rand(1024)

while more_to_do(data):
     removed_value = select_item(data)
     # use slicing to "remove" a particular value from the array
     data = data[data!=removed_value]

# Another way to ask the question, would be
# does indexing into data after taking
# all of these slices, e.g. calling 

value = data[5]

# take time proportional to the number of iterations 
# through the loop?

实际上下文是在凹壳算法的特定实现中，该算法使用这种切片迭代地从考虑中删除点，因为它们被选为壳的一部分。

标签： pythonnumpy